Left untouched since a double murder-suicide in the 1960s, Los Feliz murder mansion remains a neighborhood mystery.

This weird abode has inspired everything from the "House on Haunted Hill" to a robot hunter's pad.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

The home made famous by the 1983 holiday classic is now a perfectly preserved shrine to the movie.

A favorite of Amelia Earhart, ranking among those rare bridges that can be crossed without changing sides of the river.

The permanent home of Elektro, the celebrity automaton of the 1939 World's Fair.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

Frank Lloyd Wright’s most iconic home dangles over a Pennsylvania waterfall.

One of the oldest surviving lock houses on the Ohio River.

A bronze statue of Mister Rogers in the neighborhood where he grew up.

This museum is dedicated to the first coast-to-coast highway.

A larger-than-life statue of America's favorite sundae marks the place it was invented.

A humble plaque marks the site where the country music legend was found dead in his Cadillac.

These disused steel furnaces are now haunting ruins that may one day be a national park.

The universally beloved children's television figure is interred on a high hilltop in one of western Pennsylvania's oldest cemeteries.

Tucked away in the forests of Indiana resides an abandoned waterslide that is now a popular graffiti haunt.

The world's largest anatomically accurate brain sculpture.

This lovely university observatory continues to sit abandoned since its potential savior was sent to jail for fraud.

Home to several unusual artifacts, including a huge painting of George Washington.

The failure of one component toppled this entire bridge during rush hour.

For decades, this waterfall remained hidden because of an artificial dam.

Ohio's 19th-century communist micro-society.

The only remnant of a small mining town is an abandoned railroad tunnel that is steeped in ghostly lore.